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Washington Zone 10, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-637 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-637 0   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2004-12-13   
301-637 1   829J PAETEC ITEL, LLC 236   2005-12-15   
301-637 2   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-04-07   
301-637 3   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-04-07   
301-637 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-637 5   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
301-637 6   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
301-637 7   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-04-03   
301-637 8   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-06-17   
301-637 9   318J COMCAST IP PHONE, LLC 236   2010-10-11   
301-640 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-640 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-05-20   
301-640 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-06-16   
301-640 2   9212 VERIZON MARYLAND, INC. 236      
301-640 3   9212 VERIZON MARYLAND, INC. 236      
301-640 4   9212 VERIZON MARYLAND, INC. 236      
301-640 5   876D ONVOY, LLC - MD 236   2012-09-06   
301-640 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-08-17   
301-640 7   9212 VERIZON MARYLAND, INC. 236      
301-640 8   5562 METROPCS, INC. 236   2013-08-06   
301-640 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-05-20   
301-670 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-721 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-738 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-762 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-765 A BTHSMDBDDS0  9212 VERIZON MARYLAND, INC. 236      
301-765 0   9212 VERIZON MARYLAND, INC. 236      
301-765 1   9212 VERIZON MARYLAND, INC. 236      
301-765 2   9212 VERIZON MARYLAND, INC. 236      
301-765 3   9212 VERIZON MARYLAND, INC. 236      
301-765 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-11-15   
301-765 5   9212 VERIZON MARYLAND, INC. 236      
301-765 6   9212 VERIZON MARYLAND, INC. 236      
301-765 7   9212 VERIZON MARYLAND, INC. 236      
301-765 8   9212 VERIZON MARYLAND, INC. 236      
301-765 9   9212 VERIZON MARYLAND, INC. 236      
301-795 A WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2008-02-08   
301-795 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-11-15   
301-795 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-795 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-11-15   
301-795 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-825 A WASHDCSWDS8  7421 AT&T - LOCAL 236      
301-825 0   7421 AT&T - LOCAL 236      
301-825 1   5562 METROPCS, INC. 236   2013-08-01   
301-825 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 5   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-08   
301-825 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-09-19   
301-825 7   9212 VERIZON MARYLAND, INC. 236   2006-12-27   
301-825 8   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-08   
301-825 9   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2006-12-08   
301-838 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-838 0   9212 VERIZON MARYLAND, INC. 236      
301-838 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-05-05   
301-838 2   9212 VERIZON MARYLAND, INC. 236      
301-838 3   9212 VERIZON MARYLAND, INC. 236      
301-838 4   9212 VERIZON MARYLAND, INC. 236      
301-838 5   9212 VERIZON MARYLAND, INC. 236      
301-838 6   9212 VERIZON MARYLAND, INC. 236      
301-838 7   9212 VERIZON MARYLAND, INC. 236      
301-838 8   9212 VERIZON MARYLAND, INC. 236      
301-838 9   9212 VERIZON MARYLAND, INC. 236      
301-840 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-903 A GMTWMDGNDS0  9212 VERIZON MARYLAND, INC. 236      
301-917 A LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-917 0   8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-917 1   8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-917 2   829J PAETEC ITEL, LLC 236   2007-05-15   
301-917 3   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2007-12-05   
301-917 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-02-04   
301-917 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-10-12   
301-917 6   829J PAETEC ITEL, LLC 236   2005-07-08   
301-917 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-02-04   
301-917 8   8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-917 9   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2013-05-03   
301-921 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-921 0   9212 VERIZON MARYLAND, INC. 236      
301-921 1   9212 VERIZON MARYLAND, INC. 236      
301-921 2   9212 VERIZON MARYLAND, INC. 236      
301-921 3   9212 VERIZON MARYLAND, INC. 236      
301-921 4   9212 VERIZON MARYLAND, INC. 236      
301-921 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-20   
301-921 6   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2014-11-24   
301-921 7   9212 VERIZON MARYLAND, INC. 236      
301-921 8   9212 VERIZON MARYLAND, INC. 236      
301-921 9   9212 VERIZON MARYLAND, INC. 236      
301-948 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-975 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-975 0   9212 VERIZON MARYLAND, INC. 236      
301-975 1   9212 VERIZON MARYLAND, INC. 236      
301-975 2   9212 VERIZON MARYLAND, INC. 236      
301-975 3   9212 VERIZON MARYLAND, INC. 236      

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Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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